The coupling among laser modes and the relations between equivalent beam spread Angle and the surface deformation of the mirrors are obtained.
给出了激光模式之间的耦合以及等效光束发散角与镜面变形量之间的关系。
Fache backed away from the body and raised the black light again, letting the beam spread out in a wider Angle.
法希从尸体旁向后退了退身，再次高举起黑光灯，使光线从更大的角度散发出来。
Fache backed away from the body and raised the black light again, letting the beam spread out in a wider Angle.
法希从尸体旁向后退了退身，再次高举起黑光灯，使光线从更大的角度散发出来。
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